Pippa Middleton, who is reportedly pregnant with her first child, stepped out in London on a very nice day, which invited quite the summery outfit. Pippa was likely running errands as she carried two convenient satchels including a Gucci messenger bag and a DeMellier tote. While her purses were neutral, her shoes, metallic ballet flats, really worked to play up her glow and her decidedly simple outfit of gray trousers, a flouncy tank, and oversize Zanzan sunglasses ($325). While Pippa's shoes are normally pretty simple (she sticks to timeless silhouettes like flat buckled boots and Adidas Stan Smiths), these brought an unexpected flash of excitement. Read on to zoom in on the details, then shop a pair of functional gold ballet slippers just like Pippa's.